hpfs_setattr error case avoids unlock_kernel

This fixed a case that 'sparse' spotted where hpfs_setattr has an error return
that didn't go through it's path that unlocks.

This is against git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
version 6313e3c2.

Build tested only, I don't have an hpfs file system to test.

Dave
Signed-off-by: NDr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

fs/hpfs/inode.c

@@ -281,7 +281,7 @@ int hpfs_setattr(struct dentry *dentry, struct iattr *attr)
 	    attr->ia_size != i_size_read(inode)) {
 		error = vmtruncate(inode, attr->ia_size);
 		if (error)
-			return error;
+			goto out_unlock;
 	}
 
 	setattr_copy(inode, attr);